The fitness chain is targeting “exhausted parents” for the hour-long classes in Sidcup, southeast London. It aims to “reinvigorate the mind, improve moods, and even burn the odd calorie,” according to the company’s website. It begins and ends with a series of stretching exercises.

“According to our research, 86 percent of parents admit to regularly suffering from fatigue which is alarmingly high when you consider the important role getting a good night’s sleep can play in our overall mental and physical and wellbeing,” said a company spokesperson, via a press release.

“We’re always looking for new ways to tackle the issues that everyday families face, which is what ‘Napercise’ sets out to do,” the statement added.

Instructors will play atmospheric music and drop the room’s temperature during the class.

More than 100 people have signed up for this weekend’s free trial sessions, a representative told HuffPost on Friday.

Reactions were “really positive with everyone really excited to try the class for a number of reasons, including parents who find it hard to relax at home,” the rep. added. And if people don’t get to sleep during the allotted time period, staff hope they will still “get the most out of the class in terms of feeling invigorated, rested and restored, both in mind and body.”